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1. (WO2011157887) CONTROL ARRANGEMENT AND METHOD IN FUEL CELL SYSTEM

Pub. No.:    WO/2011/157887    International Application No.:    PCT/FI2011/050316
Publication Date: Dec 22, 2011 International Filing Date: Apr 12, 2011
IPC: H01M 8/04
H01M 8/06
Applicants: WÄRTSILÄ FINLAND OY
NOPONEN, Matti
ÅSTRÖM, Kim
Inventors: NOPONEN, Matti
ÅSTRÖM, Kim
Title: CONTROL ARRANGEMENT AND METHOD IN FUEL CELL SYSTEM
Abstract:
The focus of the invention is a control arrangement in a fuel cell system for producing electricity with fuel cells, each fuel cell in the fuel cell system comprising an anode side (100), a cathode side (102) and an electrolyte (104) between the anode side and the cathode side, and the fuel cell system comprising means (109) for recirculating fuel through the anode sides of the fuel cells, and at least one system controller (200) in a control processor (210) for controlling the operation of the fuel cell system. The control arrangement comprises means (202) for performing an essentially asynchronous chemical reaction rates calculation process of at least one of fuel composition and fuel flow rate to accomplish information in an essentially iterative process on at least recirculation ratio of the fuel recirculation through anodes (100) and means (204) for generating, in an essentially synchronous process with the system controller (200) process, fuel utilization (FU) information and Carbon formation information by utilizing the latest available recirculation ratio information provided by said asynchronous process. The control arrangement also comprises means (206) for performing an active cyclic system control and system monitoring process by utilizing said FU information and Carbon formation information, and said means (202) for processing the asynchronous process essentially simultaneously with the synchronous process so that said active cyclic system control and system monitoring process is processed below maximum allowed execution interval.